Built-in 6000mAh polymer li-ion battery, Provide 4A output for laser and motor, High power and create proffesional work at anytime anywhere with laptop. 38 x 38 x 70 mm Caving Space. With 108 screws and alloy structure, make it strong, also you can design your structure in the machine. Power cut memory function, If the battery power is insufficient , usb a mobile power or a 5v1a supply, It will continue to carve. Lone time use, NEJE developed the professional power IC and radiator, carving time will last much longer than other laser and more stable.